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135 lines
4.5 KiB
135 lines
4.5 KiB
/* Copyright 2018 Jason Williams (Wilba)
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* Copyright 2021 Jamal Bouajjaj (Electro707)
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "is31fl3236.h"
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#include "i2c_master.h"
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// This is the full 8-bit address
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#define ISSI_DEFAULT_ADDRESS 0b0111100
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// These are the register addresses
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#define ISSI_REG_SHUTDOWN 0x00
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#define ISSI_REG_PWM 0x01
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#define ISSI_REG_CONTROL 0x26
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#define ISSI_REG_UPDATE 0x25
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#define ISSI_REG_RESET 0x4F
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#define ISSI_REG_G_CONTROL 0x4A
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#define ISSI_REG_FREQ 0x4B
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// Default timeout if no I2C response
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#define ISSI_TIMEOUT 100
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// Reusable buffer for transfers
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uint8_t g_twi_transfer_buffer[40];
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// IS31FL3236 has 36 PWM outputs.
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// If used as RGB LED driver, LEDs are assigned RGB,RGB,RGB,RGB,RGB,RGB
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// The RGB handling is done in user space
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uint8_t g_pwm_buffer[36];
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bool g_pwm_buffer_update_required = false;
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uint8_t g_led_control_registers[36];
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bool g_led_control_update_required = false;
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void IS31FL3236_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
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g_twi_transfer_buffer[0] = reg;
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g_twi_transfer_buffer[1] = data;
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i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, ISSI_TIMEOUT);
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}
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void IS31FL3236_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
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g_twi_transfer_buffer[0] = ISSI_REG_PWM;
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for (int i = 0; i < 36; i++) {
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g_twi_transfer_buffer[1 + i] = pwm_buffer[i];
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}
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i2c_transmit(addr << 1, g_twi_transfer_buffer, 37, ISSI_TIMEOUT);
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}
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void IS31FL3236_write_led_control_buffer(uint8_t addr, uint8_t *led_control_buffer) {
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g_twi_transfer_buffer[0] = ISSI_REG_CONTROL;
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for (int i = 0; i < 36; i++) {
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g_twi_transfer_buffer[1 + i] = led_control_buffer[i];
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}
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i2c_transmit(addr << 1, g_twi_transfer_buffer, 37, ISSI_TIMEOUT);
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}
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void IS31FL3236_init(uint8_t addr) {
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// In case we ever want to reinitialize (?)
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IS31FL3236_write_register(addr, ISSI_REG_RESET, 0x00);
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// Turn off software shutdown
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IS31FL3236_write_register(addr, ISSI_REG_SHUTDOWN, 0x01);
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// Set all PWM values to zero
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for (uint8_t i = 0; i < 36; i++) {
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IS31FL3236_write_register(addr, ISSI_REG_PWM + i, 0x00);
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}
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// Enable all channels
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for (uint8_t i = 0; i < 36; i++) {
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// Set each LED to half current and enable them
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// TODO: Set an option to change the current drive thru a calling function
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IS31FL3236_write_register(addr, ISSI_REG_CONTROL + i, 0b001);
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}
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// Load PWM registers and LED Control register data
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IS31FL3236_write_register(addr, ISSI_REG_UPDATE, 0x00);
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}
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void IS31FL3236_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
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is31_led led;
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memcpy_P(&led, (&g_is31_leds[index]), sizeof(led));
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g_pwm_buffer[led.r] = red;
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g_pwm_buffer[led.g] = green;
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g_pwm_buffer[led.b] = blue;
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g_pwm_buffer_update_required = true;
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}
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void IS31FL3236_set_color_all(uint8_t red, uint8_t green, uint8_t blue) {
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for (int i = 0; i < 6; i++) {
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IS31FL3236_set_color(i, red, green, blue);
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}
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}
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void IS31FL3236_set_led_control_register(uint8_t index, bool red, bool green, bool blue) {
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is31_led led;
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memcpy_P(&led, (&g_is31_leds[index]), sizeof(led));
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g_led_control_registers[led.r] = red;
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g_led_control_registers[led.g] = green;
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g_led_control_registers[led.b] = blue;
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g_led_control_update_required = true;
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}
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void IS31FL3236_update_pwm_buffers(uint8_t addr) {
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if (g_pwm_buffer_update_required) {
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IS31FL3236_write_pwm_buffer(addr, g_pwm_buffer);
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// Load PWM registers and LED Control register data
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IS31FL3236_write_register(addr, ISSI_REG_UPDATE, 0x00);
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}
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g_pwm_buffer_update_required = false;
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}
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void IS31FL3236_update_led_control_registers(uint8_t addr) {
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if (g_led_control_update_required) {
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IS31FL3236_write_led_control_buffer(addr, g_led_control_registers);
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// Load PWM registers and LED Control register data
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IS31FL3236_write_register(addr, ISSI_REG_UPDATE, 0x00);
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}
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g_led_control_update_required = false;
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}
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